| 초록 |
This study analyzes techno-economic and environmental benefits of novel green methanol production pathways by CO2 direct hydrogenation with various hydrogen sources. Particularly, we consider three different resources for hydrogen supply (natural gas, power grid, renewable power) to identify the net benefits and bottlenecks of green methanol production pathways from industrial and ecological viewpoint. To achieve this goal, rigorous process models of the involved processes (e.g., steam methane reforming, proton exchange membrane (PEM), and solid oxide electrolysis cells (SOEC)) are developed using Aspen Plus. The capability of the proposed processes was evaluated with different criteria: energy efficiency, carbon balance, unit production cost, and net CO2 emission of the produced methanol. As a result, the optimal production pathway for green methanol production is identified. Based on this study, we can provide practical solutions for green methanol supply into the current petrochemical industry, as lowering environmental impact with acceptable price. |
